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  • Quantum walks and wavepacket dynamics on a lattice with twisted photons

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    Author(s)
    Cardano, Filippo
    Massa, Francesco
    Qassim, Hammam
    Karimi, Ebrahim
    Slussarenko, Sergei
    Paparo, Domenico
    de Lisio, Corrado
    Sciarrino, Fabio
    Santamato, Enrico
    Boyd, Robert W
    Marrucci, Lorenzo
    Griffith University Author(s)
    Slussarenko, Sergei
    Year published
    2015
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    Abstract
    The “quantum walk” has emerged recently as a paradigmatic process for the dynamic simulation of complex quantum systems, entanglement production and quantum computation. Hitherto, photonic implementations of quantum walks have mainly been based on multipath interferometric schemes in real space. We report the experimental realization of a discrete quantum walk taking place in the orbital angular momentum space of light, both for a single photon and for two simultaneous photons. In contrast to previous implementations, the whole process develops in a single light beam, with no need of interferometers; it requires optical ...
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    The “quantum walk” has emerged recently as a paradigmatic process for the dynamic simulation of complex quantum systems, entanglement production and quantum computation. Hitherto, photonic implementations of quantum walks have mainly been based on multipath interferometric schemes in real space. We report the experimental realization of a discrete quantum walk taking place in the orbital angular momentum space of light, both for a single photon and for two simultaneous photons. In contrast to previous implementations, the whole process develops in a single light beam, with no need of interferometers; it requires optical resources scaling linearly with the number of steps; and it allows flexible control of input and output superposition states. Exploiting the latter property, we explored the system band structure in momentum space and the associated spin-orbit topological features by simulating the quantum dynamics of Gaussian wavepackets. Our demonstration introduces a novel versatile photonic platform for quantum simulations.
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    Journal Title
    Science Advances
    Volume
    1
    Issue
    2
    DOI
    https://doi.org/10.1126/sciadv.1500087
    Copyright Statement
    © The Authors 2015 American Association for the Advancement of Science. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).
    Subject
    Quantum Optics
    Quantum Information, Computation and Communication
    Publication URI
    http://hdl.handle.net/10072/173235
    Collection
    • Journal articles

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